Pencil



W. R.' NOE Sepp 14,1926.'

PENCIL vFiled June 18, -19'21 Patented Sept. 14, 1926.

UNITED STATES WALTER E. Non, or NEW YORK, N. Y.

PENCIL.

Application filed June 18, 1921. Serial No. 478,633.

My invention relates to mechanical pencils of the type in which the lead is advanced by means of a push rod, operated through screw threads by the turning of the cap. It has for its object the provision of a construction in which the parts may be disconnected to allow refilling, with the least motion and a minimum of effort. The invention will be fully described hereinafter and the features of novelty will be pointed out in the appended claims.

In the accompanying drawings which are on an enlarged scale and show an example of my invention without defining its limits, Figure 1 is a longitudinal section showing the relative position of the parts when the lead first shows at the writing point; Fig. 2 is a longitudinal section partly in elevation, in a plane at right angles to Fig. 1, and showing the relative position of the parts when the lead has been completely advanced; Fig. 8 is a detail view, partly in section, of the interior and removable parts of the pencil; Fig. 4 is an end view of Fig. 3; Fig. 5 is a cross section on the line 5 5 of Fig. 1; and Fig. 6 is a detail view of the cap.

As shown in the drawings the pencil comprises a tubular barrel 10 of suitable material and formed with a tapering end 11, said barrel itself preferably having a uniformly smooth exterior surface. In the construction shown in the illustration a tube 12 extends into the barrel 10 and lengthwise thereof, the exit end 12A of said tube being located eXteriorly of and tting against the apex of the tapering end 11 of said barrel and forming the actual exit for the lead 13. The entrance or inner end of the tube 12 is fitted into a plug 14 fixed within the barrel 10 and having an axial bore in registry with the tube 12 and forming therewith a continuous passage for the lead 13; in the preferred arrangement the axial bore of the plug 14 at its entrance end is cone shaped as shown at 15. The plug 14 fits tightly in the barrel 10 and is securely fastened by friction or otherwise. The parts so far described may be of any suitable construction and form no part of the invention.

The inside. of the barrel from the cone 15 to the top end is perfectly smooth, and accommodates a removable sleeve 16 which lits snugly in said barrel 10. This sleeve is internally screw threaded throughout its entire length as indicated at 17 and is formed with an annular shoulder 18 arranged to fit against the end of the barrel and thus limit the movement of said sleeve 16 into the barrel 10. .Friction may be depended upon to prevent the turning of this sleeve in the barrel or a lug 19 may be added to the shoulder 18, said lug fitting into a notch formed in the end of the barrel as shown in Fig. 6.

As may be seen in the illustration the usual push rod 20 is attached at its upper end to a follower 21 which is in screwthreaded engagement with the screw threads T 17 of the sleeve 16 and is fitted to slide between two parallel tubular guides 22 and 23 extending lengthwise of the pencil. The inner sides of these tubes are bent in or away from each other for their entire length il terminate in the form of a cylindrical end member 26 externally screw threaded for a short distance as indicated at 27 and apertured in registry with the tubes as shown at 28 and 29 to leave an open end lead chamber in each of the tubes adapted to be closed by means of a cap 3()- which screws upon the threads 27 of the end member 26. Y

lllhen the pencil is operative or in other words when it is loaded and the lead begins to show itself at the exit end, the follower 21 occupies a position part way down the sleeve 16 for instance as shown in Fig. 1. As the cap 30 is rotated and carries with it the end member 26and tubes 22 and 23, the follower 21 will be caused to partake of this rotative movement and, because of its screwthreaded connection with the internal thread 17 of the sleeve 16, will be forced to slide longitudinally between the tube 22 and 23 toward the end of the pencil and carry the push rod with it. This lengthwise movement of the latter forces the lead through the exit 12A. When the lead has been entirely used, that is when the pencil requires refilling, the tollovver 2i has Worked through the, entire length ot the sleeve 1G and out Oement with the screw threads 17 i., shoivn in Fig. 2, so that, as rotati^n oi the cap continues, said follower Will in the open space beyond said sleeve i "iin the barrel Without further longiegress. "il the pencil, the cap 30 is pulled oni the barrel in an axial direction it the sleeve 16, lead cham- LLd 223, i'ollovver 2l, and push :v .l have been removed irom the p ltliiiay then be unscreived lead tro n one ot' the lead .ie'iore the cap 8O is replaced, is removed by sliding it in an i over the end member 2G and i-esition by sliding it back onto and at the other end. As he sleeve lo will engage the tolshift it Ytrom the position to the position shown in Fig, is t iei replaced iipon the threads been so replaced immedif =eve it was removed and is v'V '3 thiis separated. rl`he isei'ted into position in the barrel 'i the ci p s "iirned until the ilfolloiver l the thread i'l' in the which ivi sleeve it has e Il l the exist 12A.

is an iniprovement on the tlpye in that it allows retedious unscreiving proc- .Y f Vy to bring` the follow r l ent back the entire length of' ead position when the lt also recy to n the ordinary mechanical .en the present construction is e Lit 121, the parts become turning et the cap Will he parts and destroy the proved pencil the cap may tely Without injuring any i, to refilling ot course nt by the ia that the Jiracoi .lead remaining` at the exit end Ao e adv; need Yfurther.

ea l inserted into the bore 2SA until ets 'ne push rod. Vl`he sleeve is then y ii Various changes in the speciiio form shoivn and described may be made Within the scope of the ela-iins Without departing troni the spirit o my invention.

I claim:-

l. A mechanical pencil comprising a barrel having` an exit end, an internally screwthreadedsleeve litted within said barrel and terminating at an intermediate. point therein, guide members extending lengthwise of said s eeve, lead propelling means in screwthreaded engagement vith said screivthiwdld sleeve and means vv'hereoy relative rotation het veen said sleeve and said guide members with the lead propelling means thereon is brought about at will, to shi't't said lead propelling means lengthwise ot said guide members and barrel to an inoperative position beyond the inner end ot said sleeve, the latter and said t(guide members being,r removable as a unit trom said barrel to permit replenishment oit the lead, and said guide members being independently remo iable Yfrom said sleeve to permit resetting ot the lead piopellimr means at the starting point without reali ig a reverse rotation ot said sleeve.

' in a. mechanical pencil an internally i 'threaded sleeve ivitliin a barrel and sli viabiy ii'ioiinted on said sleeve and limiting its movement into said barrel, said sleeve terniniting as an intern'iediate point in said Jiarrei to provide a space within said arrel beyiiid the operative range olf said leeve, guide members within said sleeve,

r, one direction v.' ien the cap is in place, said gin le n'ieinhers carrying a propelling i unit in r'eie'iv threaded engagemeifit with said sleeve and having 7e range beyond the operative range thereof, and a push rod atta-fili l to said mic. and capable ot advancin@` a iin'il d unit has worked out oit said opening?) beyond i, orlr in tl e county oit New i .York this 16th day VALTER R. NOE.

teniovaole therefrom, a shoulder" 

